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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2019, Vol. 40 ›› Issue (12): 223283-223283.doi: 10.7527/S1000-6893.2019.23283

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles     Next Articles

Damping performance analysis of friction patches using an accelerated dynamic Lagrange method

MA Haoye1, LI Lin1,2, FAN Yu1,2, WU Yaguang1   

  1. 1. School of Energy and Power Engineering, Beihang University, Beijing 100083, China;
    2. Beijing Key Laboratory of Aero-Engine Structure and Strength, Beihang University, Beijing 100083, China
  • Received:2019-07-12 Revised:2019-08-14 Online:2019-12-15 Published:2019-09-09
  • Supported by:
    National Natural Science Foundation of China (51675022, 11702011)

Abstract: Dry friction patches with a corrugated shape is designed and analyzed using an accelerated numerical method for steady-state response of nonlinear structural systems. In order to reduce the scale of the DOFs, a double-reduction scheme is introduced and the nonlinear equations of motion is rewritten as a relative displacement form, The steady-state response is predicted by the multi-harmonic balance method combined with a velocity-based dynamic Lagrange method. The efficiency and stability of the algorithm are improved by the closed-form Jacobian matrix. The accuracy of this method is verified against the elastic frequency-time technique and the time-marching procedure based on a lumped parameter model. A good vibration attenuation of the dry friction damper on the thin-walled structures is observed by the simulation. The results show that with added mass equals to only 0.6% of the host structure, the resonant amplitude can be reduced by 75.4%. The computational efficiency can be improved significantly using the proposed method, where the CPU time can be reduced to less than 0.5% of the original approach.

Key words: dry friction damper, thin-walled structure, nonlinear system, dynamic Lagrange method, vibration attenuation

CLC Number: